Chemical Composition

Identification Symbol	Grade	Elements	Composition %
UNS C61900	26 chromium, 6 nickel, 3.5 molybdenum with nitrogen and copper 255	Aluminum	8.5–10.0 max
		Copper, incl silver	remainder
		Iron	3.0–4.5 max
		Nickel, incl cobalt	-
		Manganese	-
		Silicon	-
		Tin	0.6
		Zinc, max	0.8
		Lead, max	0.02
		Arsenic, max	-
		Phosphorus, max	-

Mechanical Properties

Diameter or Distance Between Parallel Surfaces,A in. [mm]	Tensile Strength, min ksi [MPa]	Yield Strength, min ksi [MPa], at 0.5 % Extension Under Load	Elongation in 4 3 Diameter or Thickness of Specimen min, %B
1⁄2 [12] and under	90 [620]	50 [345]	15
over 1⁄2 [12] to 1 [25], incl	88 [605]	44 [305]	15
over 1 [25] to 2 [50], incl	85 [585]	40 [275]	20
over 2 [50] to 3 [80], incl	78 [540]	37 [255]	25